Taking into consideration the legal criteria related to rape (Brazilian Penal Code) as guidelines for this kind of conduct or interpersonal symptom, the objective of this study was to investigate the personality characteristics of individuals criminally responsible for incestuous raping. Participants were three male inmates, with similar social, demographic and educational levels, imprisoned at a State correctional institution in São Paulo for raping their biological daughters. The data were gathered through interviews and Rorschach Method, as Exner's (2003) Comprehensive System. To the analysis of the results the following variables were selected: defensiveness, self-perception, capacity for self-control, relationships and interpersonal perception, affect, and cognitive processing applied to social reality adaptation. Even though rapists do not constitute a homogeneous group and there are no standard universal characteristics that represent them, the main results showed evidence of their limitation on subjective resources applied to self-perception and perception of the others. It was convergent with common data found in the literature regarding the psychology of sexual aggressors.